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Forces - Coggle Diagram
Forces
Normal Force
Normal force is the force which surfaces of objects exert to prevent and avert solid objects from passing through each other. Normal force is a contact force. The force is perpendicular to the surface as the normal force prevents solid objects from passing through each other.
For example, if we keep a book on a table, the book does not fall and pass through the table. This is so due to the table and the book exerting normal force.
Applied Force
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For example, when we push a chair across the room, we, a person, are exerting and applying force to it, an object and this force is applied force.
Gravitational Force
Gravitational force is the force of gravity acting upon an object corresponding with the mass, speed, direction, motion and shape of an object. Gravitational force is applied to every location in the universe, including space and is not a contact force.
For example, when we jump, we land on the ground on the Earth once more; we do not float away into space; this is due to the gravitational force being applied upon us.
Frictional Force
Frictional force is the force which is present when two surfaces are in contact with each other and when one of the surfaces is in constant motion and the other stationary. Frictional force acts in the opposite direction of the direction of motion of the surface which is in constant motion. Irregularities in an object's surface can result to the force of friction being higher and a smooth surface, lubricants and wheels can decrease the force of friction. Frictional force creates heat and causes wear and tear.
For example, when we rub our hands together swiftly, heat is generated due to friction and we feel hot in our hands.
Air Resistance
Air resistance can be considered as a sort of frictional force between a material in air and air itself. Air resistance is a contact force.
For example, when an aeroplane flies through the air, the air particles dash and coincide with the aeroplane, thus making it harder for it to fly and this the reason why aeroplanes are streamlined. This is the same for water as it is a fluid as well.
Tension Force
Tension force is the force which acts upon a one-dimensional continuous object, and the objects which it connects, such as a rope, string, cable, etc. It occurs when the one-dimensional continuous object is connected to two other objects and is pulled by forces acting on opposite sides which stretch the object or try to pull it apart.
For example, when a car tows another car through a chain, the chain is subjected to a tensile load and tension force is acting upon the chain.
Spring Force
Spring force is the force exerted by a compressed or stretched string which acts upon the object attached to it.
For example, when we attach two small metal discs to a string, when we stretch the string, the metal discs start rotating; this is due to the string force acting upon them.